TWebUpdate, invalid file name %s

Hi !

I am using TWebUpdate and checking if new version is avalaible but sometimes (not always) get error in Tmsd2009.bpl invallid file name -%s
I am using FTP to transfer files. The log says that FTP site is connected correctly and INF-file is downloaded,
but hen the error. The update is generated with UpdateBuilber-prog and inf-file seems to be OK
 
Some customers do not allow FTP transfers for security, in that case the new version check takes about 5 min, delaying the my app start. Is it possible to make this delay shorted if no FTP connection exists ?