Hello Sharongreene,
Sorry to hear you're having problems with getting email on your Blackberry. Typically, the problem is the result of setup issue. We have an article on Configuring your Blackberry device for email. Make sure to check out the link going to Blackberry for setup.
Additionally, the Blackberry forums have a variety of possible causes that you're not receiving emails. Please review their support forums for further information.
I hope this helps to give you enough information to narrow down the issue on your Blackberry. If you still require assistance, please let us know.
Regards,
Arnel C.