Transfer to PHP 5.1.6 from 4.4.1

[Boo-urns]

I had everything going smoothly in PHP 4, i try to transfer it to a different host (yes changed the connection on the pages etc...it did connect) I am getting these errors on the page.

Warning: include(../Connections/conn_mypetwork.php) [function.include]: failed to open stream: No such file or directory in /home/mypetwor/public_html/staging/profile.php on line 1

Warning: include() [function.include]: Failed opening '../Connections/conn_mypetwork.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/mypetwor/public_html/staging/profile.php on line 1

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/mypetwor/public_html/staging/profile.php:1) in /home/mypetwor/public_html/staging/profile.php on line 5

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/mypetwor/public_html/staging/profile.php:1) in /home/mypetwor/public_html/staging/profile.php on line 5

Warning: mysql_select_db(): supplied argument is not a valid MySQL-Link resource in /home/mypetwor/public_html/staging/profile.php on line 10

Warning: mysql_query(): supplied argument is not a valid MySQL-Link resource in /home/mypetwor/public_html/staging/profile.php on line 12

I'm guessing once it all get fixed the bottom 4 Warnings will clear up.  If anybody could point me in the right direction it would be appreciated.
Thanks,

Corey

[Boo-urns]

Well i got it to connect but now i'm getting session_start() errors.


Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/mypetwor/public_html/staging/profile.php:5) in /home/mypetwor/public_html/staging/profile.php on line 6

???

[Jessica]

What is on lines 1-6?

In the future, you need to post code AND errors. We can't do much with only one or the other.