The beeping is a low battery warning. Just get some fresh ones, I use recharables. It could cause issues with your "twitching".
If you still have problems with "twitching" then adjust the gain contoller on your 3-1.
Have you checked out this link?
Tips/Repair/Guides/Mods Links
http://www.rcuniverse.com/forum/m_70...tm.htm#7035042
Good luck and have fun.