If all is as you state below, then the only  answer here is a Telco issue.
In other words, the telephone system is not supporting your connection
for what ever reason.   It could be an issue of line noise, it could be an
issue of drop lines on your trunk connection or it could be just bad connections
at any of the junctions between you and the ISP.   This is VERY common.

Telephone companies typically do not attempt to provide line transfer purity
for any rate above 9600 baud or maybe...  just maybe 14.4k baud.   This is
a situation I continue to hear about all over the United States...   the problem
in your part of the world maybe the same, better or worse...  but, that is my
diagnosis...   I have seen it too many times to believe anything else.

   Bob Wright

At 05:37 AM 8/7/98 , you wrote:
>Hi all,
>
>I have to repost this because I think there is some misunderstand.
>
>My modem: 56Kflex KTX external modem. (56kflex is popular here and My
>ISP is going to digital use 56kflex)
>
>1) I know the max speed I can get is 33.6 currently, but I can only get
>2.64kb/s (CuteFTP test from local server).  Many users (from my ISP) use
>old phone line (live in old sububer) and get at least 31200bps, while I
>live in a place which suppose to have the fastest telecommunication/data
>communication in town.
>
>2) I was wondering to know what I should do to get the the 33600bps or
>at least 31200bps.
>
>3) I disconnect all other tele devices (phone, fax) before online.
>
>4) there seems nothing I need to upgrade.