The `at' command will not open x-terminal-emulator

Hi the at' command works very well but refuses to obey the x-terminal-emulator’ command
I have searched high and low with no answers.
Can anyone please help?
Many thanks in anticipation.

Can you paste your actual at command and also state your version of Linux/Unix desktop?

Now solved, I used:

DISPLAY=:0.0 /usr/bin/x-terminal-emulator 

and to open links2:

 DISPLAY=:0.0 links2 -g

Although it seems to work with ` DISPLAY=:0 ".
Sorry about the delay.