Internet broker TD Ameritrade is working to fix a technical glitch that has locked some of its customers out of their online brokerage accounts.
According to a Wall Street Journal report, the problems started after the online dealing system was altered to change the way clients logged on to the Web site.
The changes were aimed at clients of TD Waterhouse, the online broker that was acquired by Ameritrade. But following the changes, an unspecified number of clients have been locked out of their accounts.
An Ameritrade spokeswoman told reporters that the broker has put in place some fixes but is continuing to work on a permanent resolution to the problem.
The incident caused a spike in the number of calls to the broker's customer services team, and Ameritrade was forced to apologise to clients for long wait times.