ASP.NET Chart Control Issue

Question

hi i have one problem with asp.net chart control tootip that is if less number of coloumns are there it showing correctely but if more number of coloumns are there like 15 it will not show correctely, means if data is more than 30 characters to any coloumn it will cutting last coloumn please help its very urgent for me

string lToolTipTxt = "Project\t\t\t: " + ProjetcData.Rows[i][PPM_PROJECT] + Environment.NewLine +"Description\t\t: " + ProjetcData.Rows[i][PPM_DESCRIPTION] + Environment.NewLine +"Strategic Value\t\t: " + ProjetcData.Rows[i][PPM_STRATEGICVALUE] + " %" + Environment.NewLine +"NPV\t\t\t: " + ProjetcData.Rows[i][PPM_BUBBLESIZE] + Environment.NewLine +"Budget\t\t\t: " + (ProjetcData.Rows[i][PPM_BUDGET].ToString()) + Environment.NewLine +"Risk Rating\t\t: " + ProjetcData.Rows[i][PPM_RISKTYPE] + Environment.NewLine +"Requestor(s)\t\t: " + ProjetcData.Rows[i][PPM_REQUESTOR] + Environment.NewLine +"Approver(s)\t\t: " + ProjetcData.Rows[i][PPM_APPROVER] + Environment.NewLine +"Manager\t\t: " + ProjetcData.Rows[i][PPM_SPONSOR] + Environment.NewLine +"Sponsor(s)\t\t: " + ProjetcData.Rows[i][PPM_PLANSTART] + Environment.NewLine +"Planned Start\t\t: " + ProjetcData.Rows[i][PPM_PLANEND] + Environment.NewLine +"Planned End\t\t: " + ProjetcData.Rows[i][PPM_PLANEFFORT] + Environment.NewLine +"Planned Effort\t\t: " + ProjetcData.Rows[i][PPM_PROJECTCATEGORY] + Environment.NewLine +"Category\t\t: " + ProjetcData.Rows[i][PPM_PROJECTTYPE] + Environment.NewLine +"Type\t\t\t: " + ProjetcData.Rows[i][PPM_PROJECTCATEGORY] + Environment.NewLine +"Requesting Organization\t: " + ProjetcData.Rows[i][PPM_REQORG] + Environment.NewLine +"Sponsoring Organizaion\t: " + ProjetcData.Rows[i][PPM_SPONORG] + Environment.NewLine + Environment.NewLine + Environment.NewLine + Environment.NewLine;

datapoint.tootip=lToolTipTxt;

if i give like this it will show above issue