Hi Guys... After a lot of testing, found the solution, and may be, problem with X2... It appears that a mono clip is always forced to MONO if a Clip Pan Envelope is not present on it... Enough to enable the Pan envelope in the clip, and even let it at 0 position, and the FX is then able to pan the signal, in other words, I think that to save CPU, the Sonar Guys decided that if a Pan Envelope is not present in the clip, it has always to be regarded as mono, assuming nothing would ever pan it before the track input... Not sure how this is correct, as, checking on signal flow on documentation, it appears clear the Clip FX's are past the clip envelopes, so, this, would not justify the forcing mono of the clip output if an envelope is present or not before what is building a stereo image... For example, I could I place a Cross Delay FX panning left/right in a short clip to let a particular transient to happen only there in the whole track, and would not prefer to add such an effect never more used to be in the track effect bin... Well, I think this way... However, it seems I found the 'fix' to this... Thanks all for the support and suggestions... Alex