Audio Gaps with U-Mix Control Pro 2 - What to do?

Hey,
I bought the U-Mix Control Pro 2 and i experienced audio-gap problems. The buffer is in the beginning at 5.3 ms, and the higher i adjust it, the less the gabs appear. CPU-usage is NEVER at 100% while playing.
When loading and analyzing a track, the gaps still appear, even with a high buffer size and the CPU-usage rises (while loading) on 100%.
Why is that so? I used Spin!2+, Denon DN-MC6000 and the Vestax VCI 280 and never had those problems, everything worked fluently.
I use:
Lenovo ThinkPad SL-510
Windows 7 Home Premium 64 Bit
CPU: Intel Pentium Dual Core T4500 2.30 GHz
FURTHER MORE:
When using the Video Plug-In, the CPU is always at 100%. I would understand here that I need a more current CPU, but sound-only should work as it did, even better ( I thought ) with an Interface coming directly from MixVibes.
Could anyone help? I need it to get work til monday :/
I bought the U-Mix Control Pro 2 and i experienced audio-gap problems. The buffer is in the beginning at 5.3 ms, and the higher i adjust it, the less the gabs appear. CPU-usage is NEVER at 100% while playing.
When loading and analyzing a track, the gaps still appear, even with a high buffer size and the CPU-usage rises (while loading) on 100%.
Why is that so? I used Spin!2+, Denon DN-MC6000 and the Vestax VCI 280 and never had those problems, everything worked fluently.
I use:
Lenovo ThinkPad SL-510
Windows 7 Home Premium 64 Bit
CPU: Intel Pentium Dual Core T4500 2.30 GHz
FURTHER MORE:
When using the Video Plug-In, the CPU is always at 100%. I would understand here that I need a more current CPU, but sound-only should work as it did, even better ( I thought ) with an Interface coming directly from MixVibes.
Could anyone help? I need it to get work til monday :/