DENVER -- Three months after the nation's first citywide bike sharing program launched, officials call it a success, but they are still working out the bugs.

"Yeah, I'm having trouble with it," said Denver resident Shannon Gray, as she tried to rent two bicycles from a B-Cycle kiosk. "The screen is weird. I'm hitting five (to put in my credit card number), but it's putting in four, and I don't know why."

Her problems may have been a little embarrassing for city officials because she was having them right next to a pre-arranged photo opportunity for Denver Bike Sharing.

"Come downtown on a weekend, and you'll see these bicycles all over our city," said Denver Mayor John Hickenlooper.

Eventually, Gray also got her bikes and successfully rode away.

Denver Bike Sharing's executive director Parry Burnap told 7NEWS that for the first three months of this groundbreaking program, she and her staff have been working out the kinks.

"The touch screens aren't as sensitive as we'd like them to be," said Burnap, the program's executive director. "We're working on that. There will be changes over the winter with our vendor that will improve things like the screen strength and sensitivity."

Burnap said they have also addressed some issues with connectivity and timing between the kiosk, bikes and the docks by figuring out which cell service provider works best at each location.

"Sometimes, a bike wasn't getting recognized as being turned in," said Burnap. "Somebody would be trying to pull a bike out for the second part of a ride, and it would think the person still had the first bike. We've got those issues fixed as far as I can tell."

Also, the two-part fee had confused some riders.

People pay for a 24-hour or annual membership, but then if they keep out the bike for more than 30 minutes, usage fees begin to accrue.

"There were some people thinking, 'Oh I've got a 24-hour membership, I can keep it for 24 hours,'" said Burnap

She said they waived fees for most people, as they tried to educate the public about the system.

They have also added reminder stickers on every bike and begun sending time alert text messages.

In the first three months, one bike has been stolen, one bike was seriously damaged, and about 10 bikes had their tires slashed.

The problems are not nearly as serious as those reported in other locations that have bike sharing programs, such as Paris, said Burnap.

"People in Denver are taking really good care of these bikes," said Burnap.

The popularity of the program has been growing.

So far, more than 12,500 people have signed up for one-day memberships, which is more than anticipated.

However, Burnap said about 1,500 people have bought annual memberships which is less than expected.

She said they hope more people will try out the bikes and begin to see it not just as something to do on the weekends, but as a part of their daily routine.