Can't Open File (errno :1)

I'm doing a project with Visual Studio.net with database(there's 4 tables inside it)on MySql.But I'm having problem connecting them both..I've done the programming codes but when I try to open my database in QueryBrowser.it says "can't open file (errno :1)" n below it would be "A MySql error was encountered. The message is : cannot fetch table information. The following error occured. Can't open file".

It's the same with Visual Studio.net whenever I execute it..it says "type mysqlconnection/mysqldatareader is not defined"