Microblaze - problem with reading from user logic input

Hi there

I am trying to link some custom made logic to my microblaze processor.

Apparently it is not working (who would have guessed so? :D ) and I 
wondered if the C code I am using is correct.

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int *userlogicaddress;

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userlogicaddress=(int *)XPAR_USERLOGICREADING_0_BASEADDR; 

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dummy = *userlogicaddress; //reading from base address into dummy

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XGpio gpPB; 

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XGpio_Initialize(&gpPB, XPAR_LEDS_8BIT_DEVICE_ID);  //setting led output port

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XGpio_SetDataDirection(&gpPB, 1, 0x00000000); // setting led port output direction

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XGpio_DiscreteWrite(&gpPB, 1, dummy); // writing dummy from inputs to leds

The custom logic currently contains only one latch. "Q" side of the 
latches is connected to the databus the "D" side to pins which are 
connected to dip switches. "G" is linked to Bus2IP_RdCE

It is basically an inital try to read the state of the dip switches into 
the processor. (I know there are easier ways of doing this but it is 
just an inital start - the logic will become more complex later on).

As the custom logic only contains 1 32-bit data register I assume that 
the base address is the correct one to work with.

Is there any obviours error in accessing the register? If not I have to 
dig a bit deeper need to look in the VHDL files or the mdp file.

Cheers
 Tobi