I try to run my new game, but there is an error.

Error found in C:\(directory)\Quest\inferni1.asl:
\-----LDF-Error: Unspecified: errors:help-----/
Unable to open C:\(directory)\Quest\inferni1.asl.

Please help.

LDF's are the quest files for supporting different languages, is your game translated or something?

That was a bug fixed in version 3.51, available for download now. The error message should read "Read logfile (if enabled) for details".