EXS 24 Logic Sampler Users Group

i have installed Logic 5.5.1 in my Win XP Pro and have been using it 
for over a year now.
i don't know exactly when this problem began, but more often than none 
i have a problem selecting instruments in EXS, meaning, i click and no 
window opens to select the sampler instruments. however, i can select 
Controls window in EXS, and click on and select instruments, but they 
are not categorized and it looks like a jungle!!!
i think this started happening after i installed Redmatica's EXS 
Manager a few weeks ago, but this is only a guess.
is there anyone out there who has had the same problem and if so, 
what's the cure for it? this takes the fun out of making music :(
PLEASE HELP!!!!