software provision manager -kernel 720 issue

Hi all

I have ECC landscape with dev-qa-prd

kernel release 701.

I lately had system copy to DEV .from PRD - with software provision manager.

the kernel was change to 720.

this kernel Couse to RFC problem to external system- I know that rfcexe file  no longer exist in this kernel.

but I looking for solution.

I understand that there is a replacement for this issu - more secure (sdk rfc)

but I need help to start and configure this sdk.

I try to add the rfc file from the old kernel to the new one.

but the connection refuse to work .

(the connection are "register to server" TCP\IP)

thanks

yossi