[iggy1]

IIRC each time you hook a callback you MUST use a unique prefix for the callback header.

I'm thinking you have hooked OnPlayerConnect more than once but defined 'L_OnPlayerConnect' each time. Change the 'L_' to something meaningful. For example, in your user.pwn change it to 'user_OnPlayerConnect'.

Also remember, it's better to use small prefixes because you will exceed the callback header length limit (on callbacks like 'OnPlayerDialogResponse') with larger prefixes.