Security Differences Between C500 and SMT5600

[Guest lllr]

What are the differences between the security settings on these two phones? I unlocked both phones. The SMT5600 was unlocked by default (application) and the C500 I used the web interface at http://developer.orangews.com/orgspv/comdefq.aspx to disable the Certificate Security. All normal application will install and function succesfully on both phones except for one, Goodlink 4.5. When I tried to install Goodlink (beta) on the C500, it fails on the Secure Authenticating stage and returns an 0x6 error. The same install works fine on the Audiovox and I have been using it for a while now. The reason I am asking this is that I just got a unlocked C550 but the problem occurs on that device as well.

Is there a way to further application unlock the C500 device?

lllr