Shares in oil and gas firm Aminex jumped after it announced the spudding of the Likonde-1 Well in southern Tanzania, in which it has a 37.5% interest.The well is 50% owned by Tullow Oil, with Solo Oil owning the remaining 12.5%.A new contract to improve Brazil's elite performance planning ahead of the London 2012 and Rio 2016 Olympic Games sent shares in sports consultancy TSE Group sharply higher.Greystar Resources has generated C$43.8m from warrant holders exercising their warrants. The warrants were issued as part of the C$63.25m placing at C$3.50 a share last September. The Colombia-focused gold and silver miner had C$120m in the bank at the end of 7 January. Shares in digital networking company imJack have been suspended at 2.75p each because the company is running out of cash. A fundraising is being discussed. The company says that it has been unable to draw down £297,000 of a £500,000 facility provided by substantial shareholder Jeffrey Morris. Morris is in dispute with the company over share conversion. Morris and his wife sold 14.7m share in inNack between 20 August 2009 and 1 December 2009. This leaves them with 16.9% of imJack. Bob Morton's Hawk Investment Holdings acquired 7m of the shares, taking its stake to 7.2%. Chinese software company Sinosoft saw its shares pull out of their recent slump after it revealed in uplift in trading patterns at the end of 2009 should see full year revenues come in ahead of market forecasts.The company said business in the export tax and e-government sectors had bounced back especially well. However, as a result of marginally higher than forecast operating costs and tighter margins are a result of changes in the sales mix, profits after tax are expected to be in line with market expectations.