MSSQL connect problem

I just installed V2. I was able to build a project using a connection to MS SQL. However, when I moved the files to my linux server, I have problems. Immediately after I finish with the login.php screen, I receive the following error messages:
Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/license/include/dbconnection.mssql.unix.php:274) in /var/www/html/license/login.php on line 34
Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/license/include/dbconnection.mssql.unix.php:274) in /var/www/html/license/login.php on line 35
Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/license/include/dbconnection.mssql.unix.php:274) in /var/www/html/license/login.php on line 54
The userid/password are hardcoded into php.
I have tested with both IE and Firefox and get the same error with both. I have also tested with check/uncheck box "Remember password". I get an error with different line numbers but includes same error on line 54.