does anyone use proteus x as vst? help!

[punk_rock_eric]

hey guys, i tried the tech support with both companies, and got nowhere yet; maybe some of you had this same problem. if i run proteus x as a standalone, it sounds great. if i run it as a vst instrument inside ableton, some of the patches have an intermittent buffer underrun noise (like when your latency is set too low for the cpu to handle) when i release the key. some patches do it, others don't. but only when running through live. none of live's instruments do this, only proteus. i really want to use proteus in ableton since i spent all taht money on vintage pro modules (sound great!)

thanks,
eric

athlon 3700
2gig ddr
160 gig 7200rpm serial drive
emu 0404 pci sound card
ableton live
proteus x