Was playing my guitar today when all of a sudden the fuse popped out from the back left of the amp and the amp turned off completely ( good safety) i then found that the fuse hadnt broke...its in perfect condition and ive only had the amp for a few weeks! so anyway i tried putting the fuse back in the amp but it wont click back into place..( this is when the amp is switch off ofcourse)...took a look inside the fuse port and it doesnt look liek anything missing either? anybody know what the problem could be? thanks