WARNING:Xst:1336 - (*) More than 100% of Device resources are used

hi,
i am facing this problem mentioned below in the utilization summary..
i have made filter code in system generator then generate vhd for the
same.
when i am running this vhd code in ISE and synthesis, i am receiving
this warning..
how can i remove this warning?



Device utilization summary:
---------------------------
Selected Device : 5vlx110tff1136-1


Slice Logic Utilization:
Number of Slice LUTs: 7621 out of 69120 11%
Number used as Logic: 7621 out of 69120 11%

Slice Logic Distribution:
Number of LUT Flip Flop pairs used: 7621
Number with an unused Flip Flop: 7621 out of 7621 100%
Number with an unused LUT: 0 out of 7621 0%
Number of fully used LUT-FF pairs: 0 out of 7621 0%
Number of unique control sets: 0

IO Utilization:
Number of IOs: 9458
Number of bonded IOBs: 9458 out of 640 1477% (*)

Specific Feature Utilization:

WARNING:Xst:1336 - (*) More than 100% of Device resources are used

Number of bonded IOBs: 9458 out of 640 1477% (*)

Click to expand...

This suggests too many inputs and/or outputs being used, if 640 is the limit.

However you are using the other categories within limits.

Are all your I/O lines listed separately, making them tally 9458?
Could it be that you will reduce the count by grouping associated I/O lines under a shared node?
A syntax problem?
Etc.