<connectionStrings>
<add name="myConnStr" connectionString="Data Source=sql2.binero.se;Initial Catalog=databasensnamn;Persist Security Info=True;
User ID=användarnamn;Password=lösenord" providerName="System.Data.SqlClient"/>
</connectionStrings>
The above that your host told you is for MS SQL, see "System.Data.SqlClient"
and this part also looks like an MS SQL connection string:
"Data Source=sql2.binero.se;Initial Catalog=databasensnamn;Persist Security Info=True;User ID=användarnamn;Password=lösenord"
mojoPortal uses the settings from appSettings - example:
<add key="MySqlConnectionString" value="Data Source=localhost;Database=mojoportal;User ID=mojouser;Password=mojo123;Charset=utf8;" />
It can go in Web.config appSettings or user.config appSettings
but you need the right connection string for your MySql db provided by youre host.
Hope it helps,
Joe