Thank you very much for your reply... Access details are provided in private message.
Regarding your questions...
I see no white lines or extra spaces and basically the include file is the connections file generated by the mysqli extension...
I have changed the order of includes in a couple of ways... Where it did not throw errors doing this it kept referring to line 1 regardless
Connection information is correct and as soon as I remove everything related to the authentication from the pages behind this one there are no more issues with header already send... Also good to know is that this same cms works just fine on another live server
I hope you can find the cause... Almost hoping it is not just a white space in the wrong place cause then I'll just feel silly
Thank you very much in advance....