Error:fatal signal error in load udf
 

hello,
i am trying to simulate flow through a radial turbine wheel using dynamic mesh in fluent.
i could compile my UDF in fluent 6.3.26(32-bit),but because of low memory(maximum=4Gig)in this windows,i couldn't run my case.
i want to compile my UDF in fluent 6.3.17(64-bit),but in compiled Udfs box,when i attempt to add UDF,in fluent issues fatal signal error.
so enyone know how can i solve this problem?
with kind regards,mamy.