Problems with Memory Mapped IO in DE2 Media Computer

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Problems with Memory Mapped IO in DE2 Media Computer

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I created a custom component in Qsys for the DE2 Media Computer. But when I try to access the component in Altera Monitor Program it doesn't seem to exist. In fact the space is filled with garbage data. Also values entered into one memory address appear in several other locations....for example if I enter a value in 0x800000 it appears in 0x000000 and 0x2f800000 as well. Any suggestions as to what the problem may be? Or has anyone encountered this problem as well and found a solution?

Also the component works fine in the DE2 Basic Computer, but the problem is I need the graphics buffer provided by the Media Computer.

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