Sometimes PGP says there's no encryption happening (stays at 0.0%) but infact it is going on. You can verify this by entering this commandline command:
pgpwde --status --disk 0
If you have just the 1 disk it will be disk 0
You will then have something similar to the output below:
Disk disk0 is instrumented by bootguard.
Current key is valid.
Whole disk encrypted
Total sectors: 192426569 highwatermark: 192426569
Disk status completed
Note the Total Sectors and highwatermark are the same, that means all sectors on the disk are encrypted.
As you've just started encryption they wont be the same, but do this command once, make a note of the highwatermark, then wait a few minutes and do the command again. If the highwatermark changes, encryption is in-fact happening are you just need to wait, when its finished it will tell you. If its still the same, let us know here and we will help further