just a suggestion, but in the past i've used port 14330 (1433 x 10)
and also on my current dev machine, that has every version as an instance,
they use ports 12005 for SQL 2005, 12008 for SQL 2008 (my R2 is the defailt instance) and 12012 for my SQL 2012.
just saying, it made sense at the time.
--help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!