Local file '%s' not found

My SmartFTP stopped working, it gave me this error:

Local file '%s' not found.
Cannot login waiting to retry (30s)...

So I unistalled it, installed it again, and it worked, however when I went to use it again it gave me the same error again

Hi, ![[SYSINFO][/SYSINFO]][/[SYSINFO][/SYSINFO]].

+- System -----------------------------
Microsoft Windows XP Home
(Build 2600)

CPU Speed : 1395 MHz
Total Memory : 130032 KB
Free Memory : 9132 KB

+- SmartFTP ---------------------------
Version : 1.5.990.26
Time Stamp : 2005-10-21 21:03:26

+- Application DLL --------------------
Controls.dll : 1.6.990.26
sfFTPLib.dll : 1.5.7.2
SmartHook.dll : 1.0.2.1

+- Language ---------------------------
SmartFTP.exe : 1.5.990.26

+- System DLL -------------------------
shell32.dll : 6.00.2600.0000 (xpclient.010817-1148)
shlwapi.dll : 6.00.2600.0000 (xpclient.010817-1148)
comctl32.dll : 6.0 (xpclient.010817-1148)
riched20.dll : 5.30.23.1210
schannel.dll : 5.1.2600.136 (xpclnt_qfe.021108-2107)

+- Internet Explorer ------------------
Version : 6.0.2600.0000

+- Winsock ----------------------------
Winsock : 2.2

Try updating to the last beta build found on my signature it must solve your trouble.

Local file '%s' not found.
   Cannot login waiting to retry (30s)...
I have the same problem which reappears punctually

Try updating to the last beta build found on my signature it must solve your trouble.
I used the version 1.5.991.11 and the problem reappeared today