Scrollview with Input.MousePosition?

How do you make the Input.MousePosition fit with a GUI.ScrollView? Right now the drag/drop system does not work in my game, I found the problem, but I cannot seem to find a solution. I just can't. The problem is that the Input.MousePosition does not work with GUI group things(even worse with scrollviews). So how would I fix this? P.S: InputManagerClass.mousePosition is just a getter with Input.MousePosition.x, and Input.MousePosition.y - Screen.height.

Thanks in advance!

Code:

 private void RenderInventory(int id){
         //GUI.BeginGroup (inventoryWindow);
         ScrollPosition = GUI.BeginScrollView (new Rect (inventoryWindow.x + 0,inventoryWindow.y + 19,395,225), ScrollPosition, new Rect (0,0,370,1161));//Scrollfield.
         int cnt = 0;//Location of the current item in loops.
         for(int y = 0; y < inventoryCols; y++){//Y
             for(int x = 0; x < inventoryRows; x++){//X
                 if(cnt < myItems.Count){//If the item exists.
                     if(myItems[cnt].itname != null && myItems[cnt].itname.Length > 1){//If not null/bugged.
                     
                         Rect rect = new Rect(3+x * 46.5f,y * 46.5f,45,45);
                         GUI.Label(rect,"" + myItems[cnt].itname,inventoryButton);
 
                         if (rect.Contains(InputManagerClass.mousePosition))
                         {
                             Debug.Log("Contains MOUSE!!!");
                             if (Event.current.type == EventType.MouseDown)
                             {
                                 OnCurrentDragStart(myItems[cnt]);
                             }
                         }
 
                         //if(Event.current.type == EventType.MouseUp && currentDrag != null){
                         //    OnCurrentDragDrop(myItems[cnt]);
                         //}
 
                     }
                     //If bugged/null.
                     else{
                         //If this is null/bugged, Remove.
                         myItems.Remove(myItems[cnt]);
                     }
                 }
                 //If does not exist.
                 else{
                     GUI.Label(new Rect(3+x * 46.5f,y * 46.5f,45,45),"",inventoryButton);
                 }
                 //Increase the current loop item.
                 cnt++;
             }
         }
         GUI.EndScrollView ();//End the scrollfield
         //GUI.EndGroup ();
     }