LinuxQuestions.org - Problems with connecting to Internet on SuSE 9.2

I used to run on SuSe 9.0 and used two independent ISPs to connect
to Internet through US Robotics external modem via either one of the
two providers with no hassle at all.

Recently I upgraded to SuSE 9.2 by fresh installation from scratch
and connection to one of the providers still works O.K. while
connection to another is broken in a strange way:

Computer does connect through Kinternet but acts as if it is not
connected,namely although

# ifconfig -a

shows that my computer got 212.200.136.121 IP address,ping to any
computer,including its P-t-P at 212.200.136.100 does not respond
untill I ctrl-c out of it.

My Kinternet icon shows a connection,connection time is ticking
and my available time with ISP decreases for the amount I spent
"connected".

I even reinstalled SuSE 9.0 and again got connection to both ISPs
configured within minutes with no glitch at all.

I installed 9.2 again from scratch,same results: Connection to first
ISP works while connection to the second one is brokem the same way
as after the first installation of 9.2: Time is ticking as if
connecton is established but computer acts as if it is not connected.

It pings itself (212.200.136.121) successfuly but no other IP
address and traceroute fails at the very first and all other hops.

I wonder what changed from Suse 9.0 to 9.2 to give me so much trouble.

Output of route -n of unsuccessful and successful ISP respectively looks
like:

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
212.200.136.100 0.0.0.0 255.255.255.255 UH 0 0 0
ppp0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 212.200.136.100 0.0.0.0 UG 0 0 0
ppp0

linux:~ # route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
194.106.162.43 0.0.0.0 255.255.255.255 UH 0 0 0
ppp0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 194.106.162.43 0.0.0.0 UG 0 0 0
ppp0
linux:~ #

Suggestions will be accepted with gratitude.
mile89