CREATE DATABASE YourDatabaseName ON (FILENAME = N'FilePath.mdf')
If that doesn't work, let's see what errors in the log server.
P. S. The Fact that the database is in Simple mode does not mean that the transaction log is unnecessary ballast. The transaction log is a critical part of the database, regardless of recovery model.
If gives out: File activation failure. The physical file name "M:\Order_Log_log.ldf" may be incorrect.
The log cannot be rebuilt because there were open transactions/users when the database was shutdown, no checkpoint occurred to the database, or the database was read-only. This error could occur if the transaction log file was manually deleted or lost due to a hardware or environment failure.
Msg 1813, Level 16, State 2, Line 1
Could not open new database 'YourDatabaseName'. CREATE DATABASE is aborted.
Then, the only hands you can try to pull data into a new database, if they are valuable.
See more recommendations here. Maybe you find the solution to your problem.