RFC error while activating the Form

hi all,

i am trying to activate a new form or even while generating the pdf tab.this generates the pdf but with a popup 'no message though'.

i get a success message of bytes transmitted ,code page 0000.

but doesnot get activated.

but when i execute it..

i get an error message as below.

system_error,

message id : fprunx

message no :001

message : ADS : error when opening and RFC communication(110101)

is it a compatibility error. aor what?

i use windows o7,LDC 8.0,adobe reader 9.1 with flash player 10

can anybody suggest me whats the error and hw to go about it???