Hi,
this issue occurs due to one of the following two reasons:
1. Installation problem.
2. Operator removed a digital certificate from your device.
If its the first, try installing by going to http://majimob.com/mob/ using your device as instructed here: http://www.majimob.com/download.html If this doesn't work there isn't much we can do, your operator must have removed the certificate for Verisign which prevents us from accessing restricted API's.