aspnet_regsql question

I am running sql express that came with my visual studio program. Anyway, I am trying to run aspnet_regsql on my machine but I keep getting an error.

Start adding the following features:
Membership
Profile
RoleManager

.
An error occurred during the execution of the SQL file 'InstallCommon.sql'. The SQL error number is 5133 and the SqlException message is: Directory lookup for the file "c:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\C:\Users\Josh\Documents\Visual Studio Codename Orcas\Projects\DTC\Website\App_Data\DtcDatabase.mdf.mdf" failed with the operating system error 123(The filename, directory name, or volume label syntax is incorrect.).
CREATE DATABASE failed. Some file names listed could not be created. Check related errors.
Creating the C:\Users\Josh\Documents\Visual Studio Codename Orcas\Projects\DTC\Website\App_Data\DtcDatabase.mdf database...
SQL Server: localhost\SQLExpress
Database: [C:\Users\Josh\Documents\Visual Studio Codename Orcas\Projects\DTC\Website\App_Data\DtcDatabase.mdf]
SQL file loaded:
InstallCommon.sql

Commands failed:

DECLARE @dbname nvarchar(128)
DECLARE @dboptions nvarchar(1024)

SET @dboptions = N'/**/'
SET @dbname = N'C:\Users\Josh\Documents\Visual Studio Codename Orcas\Projects\DTC\Website\App_Data\DtcDatabase.mdf'

IF (NOT EXISTS (SELECT name
                FROM master.dbo.sysdatabases
                WHERE name = @dbname))
BEGIN
  PRINT 'Creating the ' + @dbname + ' database...'
  DECLARE @cmd nvarchar(500)
  SET @cmd = 'CREATE DATABASE [' + @dbname + '] ' + @dboptions
  EXEC(@cmd)
END

SQL Exception:
System.Data.SqlClient.SqlException: Directory lookup for the file "c:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\C:\Users\Josh\Documents\Visual Studio Codename Orcas\Projects\DTC\Website\App_Data\DtcDatabase.mdf.mdf" failed with the operating system error 123(The filename, directory name, or volume label syntax is incorrect.).
CREATE DATABASE failed. Some file names listed could not be created. Check related errors.
Creating the C:\Users\Josh\Documents\Visual Studio Codename Orcas\Projects\DTC\Website\App_Data\DtcDatabase.mdf database...
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at System.Web.Management.SqlServices.ExecuteFile(String file, String server, String database, String dbFileName, SqlConnection connection, Boolean sessionState, Boolean isInstall, SessionStateType sessionStatetype)