Hi, I have a router so I have to open up ports (i choose 1024-5000) to allow mirc to send files to my buddy, but the problem is that it times out every hour or so, and i think its related to the ports. Somehow i think the ports are getting disabled or something like that, so then I have to go back to my router seetings and re enter those ports. Does anyone know why this happens? Is my router old? (Its a D-Link 604) Something in mirc settings I have to change? Thanks and any help is appreciated.

I assume you mean FORWARD the ports to your pc rather than open them (but anyway).
I dont think its the router as the port being forwarded is only realy relevent as the connection is created, after that its not the router forwarding but the alrerady existing link that is in use that controls where the packets go, forwarding only effects unsolicited traffic coming in on port X (if im wrong in a big way someone please correct).

I would however suggest you reduce the range of ports you use, as its possable this huge range can have unexpextent problems (i experenced this sometimes), try a range like 4001-4100 forwarded in the router to your pc, and a range set in mirc ALT-o/connect/options/advanced/dcc port first 4001 last 4099 (4099 becuase mirc seems to sometimes over shoot it by 1).
Even 100 ports is a huge range, so u could use 4001-4010 or something.

open is common router slang for "forwarded to my ip"

dont gouge his eyes out over semantics

ok well i found out that i had to block the ports from going to the other computer so i disabled it through the router settings and disabling it using the internal computer's IP address...now it works fine! Thanks anyways for your help.

And just how did you do that? The D-Link DI 604 only allows about 25 ports to be forwarded and has no way of setting up a range of ports.