I'm not sure why this one user would have problems when everyone else doesn't, however, check this thread for the latest OS for the 8700C. For Cingular it's actually this: BlackBerry 8700c™ / Pkg:4.1.0.529, App:4.1.0.377, Plt:2.0.0.152. It might help to upgrade it.
http://www.blackberryforums.com/rim-...ry-device.html