Not recognizing SIM card

I have had the n-gage for about tow months. It has been working great until today. For some reason the device is not recognizing the SIM card. I took the sim card out and tried it on another phone and it worked...this is making me think its a problem in the n-gae not recognizing the card. HELP!

[sco2001]

maybe you have it in offline mode?Just clutching at straws, it almost crtainly won't be that.sorry

[DireStrife21]

Are you using WildPalm PhoneSecure? The software can affect the SIM card upto some extent like blocking or rejecting. Also, try cleaning your sim card's metal contacts using a pencil eraser.