[Azagthtot]

Ошибка у вас в методе buildHtml(buffType). В нем вы закрываете соединение только в одной из веток условия

conn=L2DatabaseFactory.getInstance().getConnection()
			buffCount = 0; i = 0
			getList = conn.prepareStatement("SELECT * FROM buffer_buff_list WHERE buffType=\""+buffType+"\" AND canUse=1")
			rs=getList.executeQuery()
			while (rs.next()) :
				try : buffCount += 1
				except : buffCount = 0
			if buffCount == 0 : HTML_MESSAGE += "<center>No buffs are available at this moment!</center><br>"
			else :
				availableBuffs = []
				getList = conn.prepareStatement("SELECT buffId,buffLevel FROM buffer_buff_list WHERE buffType=\""+buffType+"\" AND canUse=1  ORDER BY Buff_Class ASC, id")
				rs=getList.executeQuery()
				while (rs.next()) :
					try :
						bId = rs.getInt("buffId")
						bLevel = rs.getInt("buffLevel")
						bName = SkillTable.getInstance().getInfo(bId,bLevel).getName()
						bName = bName.replace(" ","+")
						availableBuffs += [bName+"_"+str(bId)+"_"+str(bLevel)]
					except: HTML_MESSAGE += "Error loading buff list...<br>"
				try : conn.close()
                                except : pass

Выделенное удаляем, и вставляем перед
HTML_MESSAGE += "<br><font color=\"303030\">