Merging svcds(mpeg2's) getting out of sync sound...

Well i always use my tmpegnc to merge/cut/encode....then i use dvd author...but i was trying to merge to svcds...and i always keep getting this same error...is der a program out der that can merge these files easier....anyone with some info...please let me know....i deal with this problem everyday....i just wanna merge them encode them to svcd...a resolution compatible with dvd 352x240/720x480/ but it wont let me....latas great info you felas got here....reason***