What do you mean they wont do incoming? I use one from the market and it works well. Play with the settings to backup sooner if you dont like the time frames it backs up as.that actually works on my DroidX. The ones posted in Market don't do incoming...Useless
It's a Motorola Firmware problem. Here is what I did to resolveI'm having the same problem - I have a droid bionic, and I installed BackupSMS then uninstalled it to try other programs, then I wanted to return to backupSMS and now it won't catch incoming messages.