XI and R/3 connection

hi all,

i am doing file to idoc scenario. before doing this we have to connect xi and r/3.

i done all steps. but in romote login i am able to login form xi to R/3. but i am unable to remote login from r/3 to xi. This problem i am facing from so many days.because of this i am unable do the file to idoc scenrio.

Please help this.

regards

manoj