Regarding the Status of Info Sources

Hi all,

I have loaded the Master Data and Transaction Data in to the Cube, but, when I look at the Info Sources (Info Source Overview in the context menu of the Cube), I see all the Info Sources Status in “RED”. But, when I check it, the data is loaded. Can anyone help me how to get the Status of the Info Source to “GREEN”? Also, I would like to know why this Error has occurred.

All the respective answers are duly rewarded.