!!!Urgent !!!!!Cannot recovery database without log files (SQL 2008)

I only have single mdf file, the transaction log file was corrupted. When I was trying to attatch the mdf file, I received the following error message. Can someone give me a help..... it's really urgent!


TITLE: Microsoft SQL Server Management Studio
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Attach database failed for Server 'DEV8\sqlexpress2008'.  (Microsoft.SqlServer.Smo)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.0.1600.22+((SQL_PreRelease).080709-1414+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Attach+database+Server&LinkId=20476

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ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

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Could not open new database 'Smartadmin'. CREATE DATABASE is aborted.
File activation failure. The physical file name "C:\MSSQL\Smartadmin_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. (Microsoft SQL Server, Error: 1813)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.00.1600&EvtSrc=MSSQLServer&EvtID=1813&LinkId=20476

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BUTTONS:

OK
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Javafun