Can not set domain trust relationship

We are trying to set a domain trust relationship between offices. Our office is in US, the other office is in Europe.
We are all connecting through the Corporate office that is in US. I can ping the domain controller from Europe, they can ping ours, but establishing a trust fails with the message "a domain controller for the xxxx domain could not be contacted"
I should mention that we are currently using different subnets.
(private IP addresses though...) They have Win2k servers, We have NT4 but also fails when trying with a new Win2k domain I have set up for test purposes. However I can establish the trust between the local domains. Any ideeas?

You need to focus some more on providing information about the WAN. How are you connecting, what equipment is at each end...Definately have to start there first...

Here is an MS article with the steps to create this trust between NT4 and 2000.
Setting up a trust between NT4 and 2000

If you have followed the above try creating a lmhosts file.
Creating a lmhosts file

Also if you have more than one W2K at the Euro location make sure the one you are pointing to is labeled as a DC.

Ok, more info...
Even more I've just found out that I can't set the trust with the Corporate office. At our end there is a 2600 series Cisco router making the link to a T1 line. At their end I have no ideea what equipment they have but I'm sure it is something similar since they gave us this router to enable voice over IP for the inter-office phone system. Other inter-office applications such as Lotus Domino mail and Oracle are working fine, internet access is also fine.
Our subnet is 7.7.7.0/24 and their subnet is 192.168.50.0/24

Quote:

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Originally posted by CJK
Here is an MS article with the steps to create this trust between NT4 and 2000.
Setting up a trust between NT4 and 2000

If you have followed the above try creating a lmhosts file.
Creating a lmhosts file

Also if you have more than one W2K at the Euro location make sure the one you are pointing to is labeled as a DC.

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Didn't work... :(
The server I am pointing to is a DC.