Problems adding buttons with BITMAPs in using TFT_Buttons

Well.... I was adding certains buttons to one screen, using bitmaps previously converting to .c format using the utility imageconverter that cames with the library...

I "import" them to mi skecth like that:

extern imagedatatype name;
...
...

I try to add just one more button but it does not work... I don¡t see problems on memory, all seems work well, however after do it I just get a black screen in my TFT ....

Any kind of limitations in the library, it seems like that, do I have to controll something more???

I am using arduino Mega....

How many buttons have you made because there is a default set limit to the amount of buttons you can have. If you need more then you need to change a variable in the library.