Sub Report in a Custom Tab

Hi Folks,

We have a custom tab that tracks information on Education events.  I'm trying to insert a report into the custom tab but when I do so it overtakes the custom tab - fields that were editable are no longer and the background color changes from the tab's yellowish color to the report's white background.

I've made the sub report as small as I can - it's just returning one piece of data - but it still seems to get put on top of the custom tab somehow, thereby overtaking it.

I'm sure (or at least I hope) that I'm missing something obvious to fix this ...Let me know if this problem needs clarifying and I'll try to elaborate.

Any and all help appreciated.

Thanks,

Adam