A second meeting followed in January, but then talks stalled.
After the summit, however, talks between the two States stalled.
More recently, though, the talks have stalled, said two people involved in the discussions.
This is not the first time talks between the two companies have stalled since negotiations began in late summer.
But the talks stalled on a number of other issues, including the electoral system to be used.
Talks to end the riot stalled throughout the first 24 hours.
Separate talks with two rebel groups in the west have stalled for months.
The talks stalled last Friday as the two failed to reach agreement.
This means the talks over a new credit line for Hungary worth up to €20bn has stalled.
Western officials are worried that any talks will stall without international supervision.