excel shakes in live market

Hi, I have stocks data stream coming to an excel...need to generate history of calculations and incoming data along with timestamp in excel. timestamp stock-price 0900 100 1000 101 1100 102 like this

WHEN I LINKS EXCEL TO AMIBROKER WITH THE RTD EXCEL FILE WHICH HAS SOME MACROS TO TRANSFER LIVE DATA FROM TRADETIGER TO EXCEL IT START TO SHAKE OR VIBRATING AFTER 2 HOURS IN LIVE MARKET. PLS HELP ME I USE MS EXCEL 2007.