Adding custom php/sql script into custom vb page

[netstormx]

I've used the instructions found on this thread to add a custom page. Now I am trying to input php/html code from a sms script I have to make it work on that page. The problem I am getting is this

Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in /home/cell/public_html/includes/adminfunctions_template.php(3596) : eval()'d code on line 29

Is it even possible to add a script into the template file like this? Any help would be greatly appreciated. Thanks.