Small Clicks on Virus TI

Hello
For some time I have a problem with the Virus TI (not TI2), which is connected by USB. I have a small distortion (clicks) in the left channel, such as a file in link.

http://piotrkubiak.pl/!/virus_clicks.wav

It seems to me that the clicks are associated with the cutoff filter automation.
I am using the virus for several years and before the problem does not appear.
I have PC with windows xp, Cubase 4 and Motu Ultralite Firewire.

I upgraded drivers Virus to latest (public beta) but nothing changes. I tried to change Motu latency, but it also does not help.

Please help.

Yes:

http://www.piotrkubiak.pl/!/virus_Clicks.cpr

I discovered a very strange thing. When setting out this patch to USB 3 L+R but solo USB1 L+R and play arrangement I hear clicks only on USB1! When Solo USB3 I have sound without clicks.