I have tryed to capture a video with two different webcams and got both times an error. Why does vegas pro not support these generic webcam-models with 4k and 1k? Can anybody help out there?

VEGAS Video Capture

Exception 0xC0000005 (access violation) READ:0x4 IP:0x4427F3
In Module 'VidCap60.EXE' at Address 0x400000 + 0x427F3
Thread: GUI ID=0x5CA8 Stack=0x19C000-0x1A0000
Registers:
 EAX=03ec8520 CS=0023 EIP=004427f3 EFLGS=00010246
 EBX=03ec7fe0 SS=002b ESP=0019cea8 EBP=0019d314
 ECX=00000000 DS=002b ESI=03ec7da8 FS=0053
 EDX=03fc9d28 ES=002b EDI=03ec8520 GS=002b
Bytes at CS:EIP:
 004427F3: 8B 51 04 89 54 24 48 8B .Q..T: 47 30 8B 48 08 8B 55 08 G0.H..U.
Stack Dump:
 0019CEA8: 00000000 
 0019CEAC: 00982CE0  00900000 + 82CE0 
 0019CEB0: 75F4EF4C  75F10000 + 3EF4C (USER32.dll)
 0019CEB4: 00000001 
 0019CEB8: 0000591C 
 0019CEBC: 04615BA0  045B0000 + 65BA0 
 0019CEC0: 0019CFA8  000A0000 + FCFA8 
 0019CEC4: 00000000 
 0019CEC8: 00000000 
 0019CECC: 00000000 
 0019CED0: 00000001 
 0019CED4: 00000000 
 0019CED8: 00000000 
 0019CEDC: 00000000 
 0019CEE0: 03EC7FE0  03EC0000 + 7FE0 
 0019CEE4: 00010003  00010000 + 3 
> 0019CF00: 75F45C8E  75F10000 + 35C8E (USER32.dll)
> 0019CF04: 75F460BF  75F10000 + 360BF (USER32.dll)
> 0019CF34: 65660450  65610000 + 50450 (COMCTL32.dll)
> 0019CF44: 005500B2  00400000 + 1500B2 (VidCap60.EXE)
  0019CF48: 80006010  7FFF0000 + 16010 
  0019CF4C: 0019D230  000A0000 + FD230 
  0019CF50: 000A0000  000A0000 + 0 
  0019CF54: 0000018F 
> 0019CF5C: 7584C7A5  757F0000 + 5C7A5 (gdi32full.dll)
> 0019CFD0: 75206C11  75200000 + 6C11 (GDI32.dll)
> 0019CFD8: 75206C2A  75200000 + 6C2A (GDI32.dll)
> 0019CFE4: 0049414E  00400000 + 9414E (VidCap60.EXE)
  0019CFE8: 0019D080  000A0000 + FD080 
> 0019CFEC: 65660DE7  65610000 + 50DE7 (COMCTL32.dll)
  0019CFF0: AE01193C  7FFF0000 + 2E02193C 
  0019CFF4: 028A018F  028A0000 + 18F 
> 0019CFFC: 005500B2  00400000 + 1500B2 (VidCap60.EXE)
> 0019D000: 65660DFE  65610000 + 50DFE (COMCTL32.dll)
  0019D004: 00000000 
  0019D008: 00000000 
  0019D00C: 028A018F  028A0000 + 18F 
> 0019D01C: 75F49657  75F10000 + 39657 (USER32.dll)
> 0019D02C: 005500B2  00400000 + 1500B2 (VidCap60.EXE)
  0019D030: 00000001 
  0019D034: 00000000 
  0019D038: 00000000 
  0019D03C: 009C6950  00900000 + C6950 
> 0019D040: 005500B2  00400000 + 1500B2 (VidCap60.EXE)
  0019D044: 0019D084  000A0000 + FD084 
> 0019D048: 75F43755  75F10000 + 33755 (USER32.dll)
  0019D04C: 0144B7A0  01300000 + 14B7A0 
> 0019D05C: 005500B2  00400000 + 1500B2 (VidCap60.EXE)
- - -
 0019FFF0: 00000000 
 0019FFF4: 005C46CA  00400000 + 1C46CA (VidCap60.EXE)
 0019FFF8: 00375000  00200000 + 175000 
 0019FFFC: 00000000