Unable to follow back my followers manualy via twitter. June 7th

I'm unable to follow people that are following me or new people that I choose to follow. I thought I might have reached my ratio limit so I waited until it came down and tried again. No joy.. :-( This all started about June 6th. I've heard others having the same issue that don't have as many followers as I do. My other friends have tens of thousands of followers with ratios much higher than I and they are not reporting any issues yet. Please help. Thank you for your time in helping with my issue :-)
**UPDATE** It appears the issue has been resolved. Thanks guys! :-)