H4 extension

Dear friends:

I meet a big trouble. The expiration date in I-94 card for me (H1visa) is to 2007/Feb, My wife (H4) just came to here from China through Los Angeles last week and found her I-94 card expiration time is 2005/March. Only one month left. In principle, her time should be same to me. Who have this experience and how to change it?

Thanks very much for your valuable information.