Teamspeak SDK, EntryPointNotFoundException

Hi,

I'm trying to integrate Teamspeak SDK into my application. I'm using Unity3d with C#.

By copying the client example code into the project and starting a client an error gets thrown when the playback and capture devices should be opened:

 device not registered/known

Since I failed to find out what went wrong (I opened a seperate question for this issue: Unity Answers Thread) I tried to query the default playback/capture devices by using:

 IntPtr modeIdPtr = IntPtr.Zero;
 uint error = teamspeak_client.ts3client_getDefaultPlayBackMode( out modeIdPtr);
             
 if ( error != public_errors.ERROR_ok)
     Debug.LogError( "Failed to get default playback mode: " +getErrorMessage( error));
 else
 {
     modeId = Marshal.PtrToStringAnsi( modeIdPtr);
     teamspeak_client.ts3client_freeMemory( modeIdPtr);
 }
 
 IntPtr playbackPtr = IntPtr.Zero;
 error = teamspeak_client.ts3client_getDefaultPlayBackDevice( modeId, out playbackPtr);
 
 if ( error != public_errors.ERROR_ok)
     Debug.LogError( "Failed to get default playback device: " +getErrorMessage( error));
 else
 {
     playbackDevice = Marshal.PtrToStringAnsi( playbackPtr);
     teamspeak_client.ts3client_freeMemory( playbackPtr);
 }

The following errors are thrown:

 EntryPointNotFoundException: ts3client_getDefaultPlayBackMode
 EntryPointNotFoundException: ts3client_getDefaultCaptureMode
 

I'm pretty sure that I'm importing the dll correctly. This is how my dll import looks like

 [DllImport("directsound_win32.dll", EntryPoint = "ts3client_getDefaultPlayBackMode")]
 public static extern uint ts3client_getDefaultPlayBackMode(out IntPtr result);
 

Any ideas why these errors occur? I didn't manage to find a solution so far...

Thanks!

Kathrin