A Kuwaiti sheikh is suing UBS AG ( id="symbol_UBSN.VX_0"> UBSN.VX ) for $21.4 million, alleging the Swiss bank failed to pay him for helping it become lead arranger on a $9 billion asset sale by the Kuwaiti telecommunications operator Zain, a Dubai court heard on Sunday. The case highlights the complexity of doing business in the Gulf, where personal connections to high-ranking officials or executives are often valued in deal-making. Sheikh Meshal Jarah al-Sabah, a member of Kuwait's ruling family, says UBS recruited him with a verbal contract in July 2009 to help scupper the French media conglomerate Vivendi's ( id="symbol_VIV.PA_1"> VIV.PA ) bid to acquire Zain's ( id="symbol_ZAIN.KW_2"> ZAIN.KW ) operations in about 15 African countries. UBS denies the allegation. Vivendi called off the talks later that month. India's Bharti Airtel ( id="symbol_BRTI.NS_3"> BRTI.NS ) subsequently bought Zain's African asse