Forums mIRC Help Connection Problem Unable to Connect to Server

In reference to my previous post. I sign on to sandnet and it initially worked fine. I turned off my PC came back the next day and this is what I got.
[5:15pm] * Unable to connect to server (Connection refused)
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[5:15pm] * Connect retry #1 irc.sandnet.net (6666)
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[5:15pm] * Unable to connect to server (Connection refused)
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[5:15pm] * Connect retry #2 irc.sandnet.net (6665)

I uninstalled Mirc and reistalled. I was again able to connect. However, at the end of the night I turned off my PC when I went to sign on the following day I got this.
[5:15pm] * Unable to connect to server (Connection refused)
————————————————————
[5:15pm] * Connect retry #1 irc.sandnet.net (6666)
————————————————————
[5:15pm] * Unable to connect to server (Connection refused)
————————————————————
[5:15pm] * Connect retry #2 irc.sandnet.net (6665)

Any suggestions why this is happening??????

All suggestions are appreciated.

Thanks