Switched internet providers and we could not connect to our filemaker server

[blen]

New to filemaker but everything was working fine prior to us switching internet providers.

The IP address remains the same, we do not have a new router, same old router, we changed the DNS settings, got our internet, 5003 is forwarded, but for some reason we could not connect to our server remotely. 

Am I missing something?

[Ocean West]

it would be impossible for your public IP address to remain the same switching between providers as these are allocated to each provider.