Database Mirroring Transport is disabled in the endpoint configuration.

[umeshpotdar]

i am doing mirroring on the data base

i have done every step but i got problem below

"Database Mirroring Transport is disabled in the endpoint configuration."

this problem occured when i cilck on the
"start mirroring" button

can anybody know about mirroring

than plz tell how to solve this problem........ .....

thanks..