FlashFXP can't detect autoresume

I am connecting to FTP server that surely support resuming, however FlashFXP somehow "thinks" it does not.
Here the console output:

WinSock 2.0 -- OpenSSL 0.9.8i 15 Sep 2008
[R] Connecting to OIS (1) -> IP=66.60.146.115 PORT=21
[R] Connected to OIS (1)
[R] 220 mono.oisi.loc X2 WS_FTP Server 6.0(62608520)
[R] USER boaz@medivision.oisi.com
[R] 331 Enter password
[R] PASS (hidden)
[R] 230 User logged in
[R] SYST
[R] 215 UNIX
[R] FEAT
[R] 221-Extensions supported
[R] SIZE
[R] XMD5
[R] XSHA1
[R] XSHA256
[R] XSHA512
[R] LANG EN, ES, FR, GE
[R] MDTM
[R] MLST size*;type*;perm*;create*;modify*;
[R] REST STREAM
[R] TVFS
[R] UTF8
[R] AUTH SSL;TLS-P;
[R] PBSZ
[R] PROT C;P;
[R] 221 end
[R] REST 100
[R] 110 Restart from 100
[R] This site may not allow file resuming
[R] PWD
[R] 257 "/users/boaz" is current directory
[R] TYPE A
[R] 200 Transfer mode set to ASCII
[R] Listening on PORT: 65342, Waiting for connection.
[R] PORT 192,168,7,6,255,62
[R] 200 Command PORT succeed
[R] LIST -al
[R] 125 Transferring directory
[R] 226 Transfer completed
[R] List Complete: 603 bytes in 2.14 seconds (0.3 KB/s)

What is wrong here and how I can work around it?
After all to me it looks OK - the site return " 110 Restart from 100" on " REST 100" request.

Thank you,
Roman.

What exact version/build of FlashFXP are you using?

Everything looks fine in your session status log, I'm not sure why it would indicate that resume might not be supported.

The "About" box says 3.6.0 (build 1240) , compiled on 2008, February 20.
That's the last one I was able to get from "updates" .
After this version calling "Check for updates" returns "There is no upgrade available at his time" window, so I guess it's latest.

Open the Site Manger, select the site, then select the Advanced tab

Change the option resume support from (auto detect) to yes

I suspect the problem is caused by the reply number from REST which gives a false positive for resume support, setting the option above will skip this test.

You'll need to actually attempt to resume a file to determine if FlashFXP is actually compatible with this FTP server.

If it doesn't work you can download v4.0 RC1 from
https://oss.azurewebsites.net/download.php?s=4

Setting it to "yes" helped - resume works.
Do you want me to try 4.0 to see if autodetection works there?