Hi, I purchased a model

Question

Hi, I purchased a model 3100 maestro from Radioshack last 11/23/07 just about 31/2 mos. Last time I used it was december. I try to use it this friday and doesn't work, so I let it charged in the car for the time I've been driving. Yesterday, saturday I try to use it again but nothing happened. I went to the store they try something and they said to go to your web and here Iam. How are you going to resolve this issue? Thanks. MATT E.