Virus+Logic Midi Channel Troubles

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Hello All,

I'm new to this forum and recently got a Virus TI Desktop. I have a question regarding the use of midi channels with the Virus. As instructed in the manual, when I use multiple sounds with the Virus, I open them on different midi channels in Logic. My problem is that when I assign a bass to midi channel 1, a pad to channel 2 and then put a bass amp (for example) on channel 1, Logic automatically puts that same bass amp on channel 2 as well. I tried automation and bypassing the plug-in on channel 2, but then it bypasses the plug-in on channel 1 as well. This is kind of an issue since it really prevents me from developing sounds the way I want to, any suggestions or answers would be much appreciated!! Thanks!