How do I use Identity_Insert on a table from a dbase located on an entirely different server?

I am working on developing DNN modules for my company intranet to replace the need for Access to perform certain functions. My intranet is located on 1 server which is seperate from my main SQL server. I developed all the stored procedures with a copy of the live database which I placed on the same server I was developing the modules. I got everything working perfectly, but then once I pointed the path for all procedures to the live database I get an error on the 2 insert procedures which require an Identity_Insert statement. To get the path to work on SQL I had to place brackets around the server and database name to treat it as a single argument since it seems Identity insert will only allow 3 arguments ->[UCLISERVER1.Engineering01].dbo.Activity. However, now that everything is hitting the live database I get the error {Cannot find the object "UCLISERVER1.Engineering01.dbo.Activity" because it does not exist or you do not have permissions.} when I try to run the code that calls the insert procedure. If I rem out the Identity_insert lines I just get the generic error telling me I need them. Does anybody know how to get around this?