can loadrunner support 64bits DLL for cusers?

I wrote a script for using a DLL,When dll is 32bit,It's fine.

But if the dll is 64bit, there is a report:

vuser_init.c(4): Error: C interpreter run time error: vuser_init.c (4): Error -- File error : LoadLibrary(SSLtest.dll) failed : (null).
vuser_init.c(4): Notify: CCI trace: vuser_init.c(4): ci_load_dll(0x02bb5058, 0x029b03bb "SSLtest.dll")
.
vuser_init.c(4): Notify: CCI trace: Compiled_code(0): vuser_init()