Ok so im working on a 2d pong game on XNA;to check for collisions,ive created bounding rectangles for every object...now the problem that im having is that sometimes....when the ball speed gets very high,the bounding rectangle of the ball crosses over the bounding rectangle of the pong without really intersecting it.... im doing something like this .....ballvector.X+=speed*gametime.elapsedmilliseconds and ballvector.y+=speed*elapsedmilliseconds.......now when X and Y attain a value that is larger than the height of the pong and the ball combined,they just cross over without the two rectangles actually intersecting each other...resulting in a ghost effect with the ball seeming to pass through the pong,how do i overcome this...without creating larger bounding rectangles?

thnx....so basically i need to run a loop AFTER the object has crossed over and check whther it shouldve collided or not by incrementing the speed of the object in small amounts when the ball was at its previous location?that does seem a bit logical........but then i will also have to run a loop and check whether the ball has crossed every other objects x or y location each time it moves.....wont i?....