In the county match, Vincent batted very slowly during Sussex's run-chase along with teammate Navid Arif. Surrey lost and the court was told Vincent gave £15,000 to Arif who is an associate of Gulzar.
The Hong Kong Cricket Association said it was "unable to comment in the circumstances".
Ahmed has played six ODIs and eight T20 internationals for Hong Kong but has not played since the end of October after withdrawing from playing for personal reasons.
The charging of Ahmed has shocked the cricket community in Hong Kong who are ranked 11th in the world in T20 cricket and will play the likes of England and South Africa at the World T20 in March if the team makes it way through the preliminary stages.
And the Sydney Morning Herald reported it could also have far wider reaching implications with the ICC's Anti-Corruption Unit understood to be continuing a probe into illegal bookmaking networks, and in particular their targeting of players in associate nations.
Ahmed has engaged a Hong Kong-based Australian lawyer Kevin Egan who has spoken in defence of his client.
Egan said Ahmed had been charged with failing to report an approach "from a former Pakistani cricketer in Hong Kong", and there was no suggestion at all he had been involved in corruption.
"[The former cricketer] was like a father figure to him and [Ahmed] was approached with a corrupt offer which he rejected. But the only criminality alleged against him by the ICC was simply having failed to report that approach," Egan told the SMH.
"At the moment we're in negotiations with the ICC and those negotiations have not yet concluded. I expect that within the next couple of weeks we will have come to a conclusion."
Under the ICC anti-corruption code, it is an offence to fail to report a corrupt approach or knowledge of one.
In an interview last month with London's Daily Telegraph, the chairman of their investigative branch, Sir Ronnie Flanagan, warned of the corruption threat to lower level cricket including in associate nations, where players could be targeted because of their low wages.
Hong Kong's nine contracted players earn between $HK9000 ($1600) and $HK11,000 ($NZ2500) a month.
"The harder international cricket is made as a target the bigger the risk of displacement towards domestic games and lower levels of international cricket," Flanagan said. "For the bad guys to succeed they want an event that is televised then they can go about their illegal betting."
