StandardView button is being selected in the ribbon even user clicks on Datasheet view of a library created using custom template.

Hi,

We have an issue with one of the library created using custom library template. Eventhough user selects Datasheet view from the ribbon it's showing Standard view button as selected. However content is being correctly in the grid view. Can some one help me in sorting this issue.

NB: Functionality is working as expected with library created using OOB document library template.

In the above screen shot Datasheet was selected.but Standard View was highlighted. 

Is that something should be done in schema.xml file?

Thanks,

Venugopal