When the handheld displays the Battery icon with a red line through it, an incorrect battery type is inserted in the handheld. To resolve this issue, use only a RIM manufactured battery for your specific handheld model. Curve batteries are normally blue (at this time at least) and Pearl batteries are yellow".
Talk to tech (dial 611 and say "my phone isn't working") they will trouble shoot it with you (call in on a different phone).