Half recording

A few questions: Did this problem just start to happen? Have you recorded prior to this without any problems at all? What audio driver are you using? You could try a restart and a reinstall..... A lot of people on this forum are very friendly and helpful so by all means stick around because its a great forum. There is a lot of good finds everywhere.

I meant that I play my guitar after pressing record, I don't press the play button, sorry for the confusion. I have been able to record just fine for a while before this, it started about a month or two ago. I'm using version 3.03 if that helps. I use the USB out from my Diditech RP250 (dry, no effects or amp modeling). I can hear it when the record monitoring is on.

If it were happening to me I would probably reinstall reaper....It may fix things...it may not but you never know until you try.....3.104 is working solid for me. I wish I could be of more help.......

I tried reinstalling, no difference. Should I try an older version?

It might just be worth renaming the reaper.ini file (usually found in XP in DRIVENAME:\Documents and Settings\COMPUTERS NAME\Application Data\REAPER). Call it something like ReaperOld.ini. I don't think the ini file is overwritten when you upgrade. The next time reaper runs, it will create a new ini file, and this may solve your problem. This will of course set EVERYTHING to the default settings, so beware of this, but you can always go back to the original ini file if it doesn't work. Worth a try anyway, I've done this succesfully on a couple of occasions recently when Reaper started to screw around. Stephen