i reinstalled my wallet and now i cant get on it i keep getting this
You managed to corrupt parts of it somehow. Make a backup (before doing anything else) and try starting with -salvagewallet that should put your private keys in a new wallet dat and rebuild the transactions etc
To do that just open run menu (win+r) and enter (assuming you have 64bit windows, otherwise remove "(x86)"
c:\program files (x86)\Guerillacoin\guerillacoin-qt.exe -salvagewallet