Problem after upgrade to freepbx 2.5

after make the upgrade from Unembedded freePBX >> module admin >> upgrade to freepbx 2.5, return message successful , but there some problem face me

1- when try to add sip extension, i see it in the freepbx, but when try to using eyebeam to test the sip account and make register, i see message error 404 not found,

2- and i can not make enable for the voice mail to any previous account which has been created before teh upgrade,

please need help to solve this problem or to downgrade the freepbx.