Sheshleen Datt took her first SkyTrain ride Tuesday, only a week after she was swarmed by a group of teenage girls outside the Nanaimo station in east Vancouver.

But in an interview with CTV, Datt said she remains uneasy about taking the SkyTrain after she was swarmed while coming home from work.

"Even though there's not a big chance to get attacked by these girls again

it's very frightening to go out,'' she said.

Datt says she was punched and threatened with a knife.

But even though the swarming occurred beneath a security camera, no-one has been charged.

"The cameras were functioning correctly, we just didn't receive a phone call to pull the tape,'' said Doug Kelsey, President, and Chief Executive Officer of British Columbia Rapid Transit Co., which operates the SkyTrain system.

At the time of the incident, Kelsey said the surveillance video tape was on a two-hour loop and not on a digital system that could have allowed the images to be preserved for seven days.

However, he said the SkyTrain is working to put the entire operation on a digital system by the summer.

Meanwhile, the father of a 16-year-old boy who died three years ago after he was attacked at a Surrey SkyTrain station said he is surprised that a digital system has not been installed already.

"I'm shocked it has taken this long. The issue of safety has to be foremost on everyone's mind,'' said David Toner.

Meanwhile Datt says she no longer rides the SkyTrain at night, having lost confidence in its security system.

"I really don't feel safe on SkyTrains anymore,'' she said.

With a report from CTV British Columbia's Janet Dirks.