Hello Pradeep,
I only gave the script example to show you how dates have to be formatted. /PERSONAS/SCRIPT_RFC_TEST will be released with SP3.
Regarding SP3 release, very very soon.
Don't use /PERSONAS/RFC_EXECUTION, use your own custom RFC. If you're familiar with ABAP debugging, I suggest you set an external breakpoint in your RFC function module (in the WinGui). Then run the script. If you don't hit your breakpoint, then you know that something is wrong with your input parameter mapping. You might want to start with an example that you works like BAPI_USER_GET_DETAIL and set a breakpoint in there first to be sure that external debugging is working.
On a side note, I think there was an issue with the RFC functionality when it comes to simple parameters that are not string, such as date and time fields. That was fixed with SP3. Again, just be a little bit more patient.
Best Regards,
Clemens