ERROR CLARIFICATION

1) There are 2 Pc’s (PC A and PC B) connected on the network, both are servers. Running on Windows NT ver. 4.0

2) They are able to connect to each other and transfer data..

3) They also have SQL SERVER ver. 7.0 standard Edition installed..
Now the problem is..

1) When i connect from system A to access the SQL -SERVER on system B it gets connected and there’s absolutely no problem..

2) But when I try to connect from the system B to system A then i get this error message –“login Failed. The maximum simultaneous user
count of 1 license for this ‘Standard Edition’
has been exceeded. Additional licenses should be
obtained and installed or you should upgrade
to a full version”

Please help
Thank You In Anticipation
John Bosco