MatteoB

Strange Problem

First of all, hi all, this is my first post on this forum.
I am using Logic Express 7.0.1 on a PowerBook G4 aluminium. As audio interface i use the Edirol UA-20.
I plug my guitar into the Beheringer V-amp 2, and then the V-amp to the audio input of the UA-20. Thats my setup. Now comes the problem. My guitar sounds normal trough the setup but as i record enable an audio track to record, the sounds gets modified as if there is some strange reverb, humanizer or some sort of wah effect active. There is ablsolutely no effect or equalization active at all on the selected track, it should just come out the same sound as when the track was not record enabled. I cant understand what is the reason of the sound getting modified.
Thank you for your attention and answers