Query Crash Problem

[Klark 0]

class:
int CShop::Buy(LPCHARACTER ch, BYTE pos)

I want to print this way.but it does not and gives the core.
 

   time_t rawtime;
   struct tm *info;
   char buffer[80];

   time( &rawtime );

   info = localtime( &rawtime );

	strftime(buffer,80,"%x - %I:%M%p", info);
	char szQuery[512];
	snprintf(szQuery, sizeof(szQuery), "INSERT INTO log.log_kulfe VALUES((SELECT id FROM player.player WHERE name = '%s'),'%s','%s','%d','%d',NOW())", ch->GetName(),item->GetVnum(),item->GetName(), dwPrice,item->GetCount());
	SQLMsg *msg = DBManager::instance().DirectQuery(szQuery);

game.core

in CShop::Buy (this=0x2a298830, ch=0x37a41800, pos=20 '\024')
    at shop.cpp:839
#4  0x0829a570 in CShopManager::Buy (this=0xbfcfa990, ch=0x37a41800,
    pos=20 '\024') at shop_manager.cpp:420

Thank you in advance.

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