GUI works fine in editor, but not in build

I have:

1. GUITexture attached to an object

2. A script that has GUIStyles created for the Textfield and Buttons that are created in OnGUI(). This script is attached to the same object in number 1

3. 3 GUIText objects each separate from the above.

4. A script that enables the GUITexture and the script in number 1 and 2 respectively

This is how it is supposed to work: When I cross the finish line, number 4 script enables number 1 GUITexture component and number 2 script component. The script component uses one of number 3's GUIText objects to show you your best lap time, and also makes a GUI.Textfield for name entry and 2 GUI.Buttons for "Submit" and "Skip". If you hit "Submit" the script will submit the time. No matter which button you press, The remaining 2 GUIText objects from number 3 will show you the top 10 best times.

For some reason, when I run it in editor, everything works 100%, but when I'm in different kinds of builds, the results vary.

When I am in a webplayer, The GUITexture and the textfield and buttons appear, but the textfield and buttons are plain and have no evidence of GUIStyles. When I click one of the buttons, the score gets submitted but I do not get the fastest times showing.

When I am in a standalone build, the GUITexture shows up, but nothing else does. If I remove the GUIStyle parameter of the GUI.Textfield and GUI.Button, they show up.

Why am I getting these variations and how can I fix it?

Code below:

 void  Start ()
         {
             Names.text = "";
             Times.text = "";
             YourBestTime.text = "Your Best Lap: " + bestTime + "\nEnter your name:";
 
             //StartCoroutine(GetTimes("Test"));
             
         }
         
     void Update()
     {
         if (!ShowButtons && !GettingTimes)
         {
             StartCoroutine(GetTimes());
             GettingTimes = true;
         }
     }
 
     IEnumerator GetTimes ()
     {    
         Debug.Log("Getting times");
         YourBestTime.text = "Loading Best Lap Times";
         WWW times_get = new WWW(GetTimesUrl);
         yield return times_get;
         WWW names_get = new WWW(GetNamesUrl);
         yield return names_get;
         
         if(times_get.error != null || names_get.error != null) 
         {
             print("There was an error retrieiving the data: " + names_get.error + times_get.error);
         } 
         else 
         {
             Times.text = times_get.text;
             Names.text = names_get.text;
             YourBestTime.text = "Your Best Lap: " + bestTime;
         }    
     }
     
     IEnumerator PostLapTime (string Name, string LapTime)
     {
         string hash= MD5.Md5Sum(Name + LapTime + secretKey); 
         string bestTime_url = SubmitTimeUrl + "&Name=" + WWW.EscapeURL(Name) + "&LapTime=" + LapTime + "&hash=" + hash;
             
         Debug.Log (bestTime_url);
         // Post the URL to the site and create a download object to get the result.
         WWW hs_post = new WWW(bestTime_url);
         //label = "Submitting...";
         yield return hs_post; // Wait until the download is done
         if (hs_post.error != null) 
         {
             print("There was an error posting the lap time: " + hs_post.error);
             //label = "Error: " + hs_post.error;
             //show = false;
         }
         else
         {
             Debug.Log("Posted: " + hs_post.text);        
             ShowButtons = false;
             PostingTime = false;
         }
     }
     
     void OnGUI()
     {
         if (ShowButtons)
         {
             //makes text box            
             nameString = GUI.TextField( new Rect((Screen.width/2)-111, (Screen.height/2)-130, 222, 25), nameString, 20, TextboxStyle);
 
             if (GUI.Button( new Rect( (Screen.width/2-74.0f), (Screen.height/2)- 90, 64, 32), "Submit", ButtonStyle))
             {
                 //SUBMIT TIME
                 if (nameString == "")
                 {
                     nameString = "Player";
                 }
                 if (!PostingTime)
                 {
                     StartCoroutine(PostLapTime(nameString, bestTime));
                     PostingTime = true;
                 }
                 
             }
             else if (GUI.Button( new Rect( (Screen.width/2+10.0f), (Screen.height/2)- 90, 64, 32), "Skip", ButtonStyle))
             {
                 ShowButtons = false;
             }
         }
     }
 }