That's not a mIRC command that I know of. I am sure it is a command specific to Dalnet.
DCCAllow is a command that you would use if someone wants to send you a file but you are having trouble receiving you would type
DCCAllow +<Nickname>
and on most occasions this would put them in a category that allows them to send you files....I had this problem when someone wanted to send me a pic. After I had typed in the dccallow command it came through. Im hoping thats what you wanted to hear
This command works on Chatnet anyways...thats where i used to chat
If the network requires it on certain file types, you would see a notice prolly in your status window telling you so. Be sure you use /dccallow +nicknamehere (with the / and no space between the + and the nickname).
If the prob is that you have mIRC set to block a certain file type, you would also see a msg to that effect in which case you would need to add that file type to those not ignored in your dcc options.
ahhh my bad i forgot the "/" thanks for pointing that out ParaBrat!