How to update model from database in Visual Web Developer 2010 Express?

Question

I have an existing model for a MySQL database. I've added a new table in my database and now I want to update the model.

But when I right-click in the Model browser and select Update Model from Database... I get following message:

An exception of type 'Microsoft.VSDesigner.Data.Local.ConnectionStringConverterServiceException' occurred while attempting to update from the database. The exception message is: ''.

Application works just fine with existing model. I mean, data is successfully fetched when needed and all.

What might cause the problem with updating the model? Is it because of Express edition? How can I resolve the problem?

UPDATE:

<connectionStrings>    
    <add name="OtherDbDataContext" connectionString="metadata=res://*/DataAccess.EF.OtherDb.csdl|res://*/DataAccess.EF.OtherDb.ssdl|res://*/DataAccess.EF.OtherDb.msl;provider=MySql.Data.MySqlClient;provider connection string=&quot;User Id=id;Password=password;Host=localhost;Database=otherdb;Pooling=true;Min Pool Size=0;Max Pool Size=100;Connection Lifetime=0;Persist Security Info=True&quot;" providerName="System.Data.EntityClient" />
    <add name="DbDataContext" connectionString="server=localhost;User Id=id;password=password;Persist Security Info=True;database=db" providerName="MySql.Data.MySqlClient" />
    <add name="DbDataConnectionString" connectionString="server=localhost;User Id=id;password=password;Persist Security Info=True;database=db" providerName="MySql.Data.MySqlClient" />
</connectionStrings>

Answer 1

Solved this problem by deleting all connectionstrings from config file. After that when you update model it prompts you to add connectionstrings and everything is working normally.

Hope it helps.