twlauncher will not stay set as default

Almost every time I use the Home key to go to my home screen, I have to pick "launcher" or "twlauncher", even if I check the "use as default" box. I've searched several forums including this one and only come up with two solutions - clear data from Media Hub, and install Home Switcher from the market. I have done both of these - clearing data from Media Hub works for a few hours, and Home Switcher has no effect at all.

I really like my Epic, but this is beyond annoying!

I registered here specifically to ask for help solving this problem, so - HELP!

Ok, for anyone who found this with a search, I need to tell you - this problem was entirely my fault. I got into the bad habit of using the Task Manager to quickly switch between recently used programs and I have since figured out that just starting the Task Manager causes the default launcher to reset - the next time the home button is pressed, it will ask which launcher to use.  I found this out by trial and error (a lot of error) so I'm posting here for anyone who gets stuck like I did.