[hcflinux] hcf_put_char: ComCtrlWrite returned 0

[Roman Shiryaev]

Hi!
I have run into serious troubles & i can't find the solution of 
my problem.
I can't to transfer any data more than ~3kb  It's terrible. :(
MDK9 with native kernel 2.4.19-16mdk was installed on my PC.
Then I tried to install any drivers 
hcfpcimodem-0.99mbsibeta02123100k2.4.19_16mdk-1mdk.i586.rpm
hcfpcimodem-0.99mbsibeta02123100-1.i386.rpm

also i've rebuilt from hcfpcimodem-0.99mbsibeta02123100-1.src.rpm
& install the 
/usr/src/RPM/RPMS/i586/hcfpcimodem-0.99mbsibeta02123100-1.i586.rpm
And use in now.

Yeah -- i can to dial perfectly by my scripts and also with kppp
But! Then i try to send anything or to upload to server then 
connection terminated and i always see in /var/log/messages that

Mar 11 15:09:53 home kernel: hcf_put_char: ComCtrlWrite returned 
0
Mar 11 15:09:53 home last message repeated 396 times
Mar 11 15:09:54 home pppd[3210]: Hangup (SIGHUP)
Mar 11 15:09:54 home pppd[3210]: Modem hangup
Mar 11 15:09:54 home pppd[3210]: Connection terminated.
Mar 11 15:09:54 home pppd[3210]: Connect time 0.8 minutes.

Also this error in dmesg

May be it can help 
[rmn at home rmn]$ cat /proc/modules
hcfpciserial           23704   1 (autoclean)
hcfpciengine          886288   0 (autoclean) [hcfpciserial]
hcfpciosspec           15724   1 (autoclean) [hcfpciserial 
hcfpciengine]
...
ppp_deflate            41024   0 (autoclean)
bsd_comp                4344   0 (autoclean)
ppp_async               7456   0 (autoclean)
ppp_generic            20064   0 (autoclean) [ppp_deflate 
bsd_comp ppp_async]
slhc                    5072   0 (autoclean) [ppp_generic]
...

Why it doesn't work? What to do? :(((

Options of ppp daemon looks 
[rmn at home rmn]$ cat /etc/ppp/options
lock
noauth
noipdefault
usepeerdns

Help please.
--
Roman