Custom Set problem

I keep getting locked up with the uploading of my custom set. Has anyone else had this trouble lately? Been trying for two days and can't get the excel to upload.

To put this one to bed, and to post the resolution, the problem was that I used excel data sorting to remove certain players/ballparks and according to Strat I left blank lines in the excel sheet.

"you need to delete the rows entirely to remove a player properly.
i.e. there should be no gaps with blank rows in the spreadsheet when you upload it"