no data for testing

 
I was testing my expert advidor, suddenly, began to appear the following message:
no data for testing, and next:
loaded saccesfuly.
Can somebody say to me how to correct this and thus I to be able to continue with my testing?
 

"Loaded succesfully" is message about expert advisor

Check your data manually - open chart and make sure that data (more than 100 bars) are presented within the range from start date and end date if "use date" is checked