Lync Phone edition not updating

Hi All, Hopefully I can find an answer to this.

We are running Lync 2010 Enterprise backend, with 2 FE, LB, etc... We have Polycom CX600 phones, and all is ok with logging in. Problem is that the phones don't want to update to new firmware. 

Updating from 4.0.7577.4397 to 4.0.7577.4414.

Test-CsPhoneBootStrap gives back a Success result.

Ive checked the IIS logs and im not getting a Request for update. Also checked the logs for the phones, there is errors but nothing really helpful. On the phone the error code is 0x5/500.

Any suggestion would be very helpful. Thanks!