problem with connecting to interet

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i am not able to connect to internet on my linux red hat 7.2 OS.the modem mounts properly using the PPP dialer (PPP connection type).but after mounting the modem ,it shows the message that "modem is busy" and does not cnnect after that.what should i do now?
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i am not able to connect to internet on my linux red hat 7.2 OS.the modem mounts properly using the PPP dialer (PPP connection type).but after mounting the modem ,it shows the message that "modem is busy" and does not cnnect after that.what should i do now?
<hr><font face="Arial" size="2"><b>Get Your Private, Free E-mail from Indiatimes at  </font><a href="http://email.indiatimes.com"><font face="Arial" size="2">http://email.indiatimes.com</font></a></b><br>Buy Music, Video, CD-ROM, Audio-Books and Music Accessories from <A href="http://www.planetm.co.in">http://www.planetm.co.in</A><br><font face="Arial" size="2">Change the way you talk. Indiatimes presents "Valufon", Your PC to Phone service with clear voice at rates far less than the normal ISD rates. Go to <a href="http://www.valufon.indiatimes.com">http://www.valufon.indiatimes.com</a>. Choose your plan. BUY NOW.</font>

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