[otrs] Configuring aspell in OTRS 2.4.3 Windows version

Hi, I Upgraded OTRS from 2.2.7 to 2.4.3 and all are working fine. Now I want to setup spellcheck for OTRS. I downloaded aspell and installed in C:\aspell and in OTRS sysconfig, I entered the spell check bin: as C:\aspell\bin, but it is not working.. I tried to enter C:/aspell/bin and some other types, but no luck. Any body can explain how to configure the same in windows environment. tks Pradeep