Grand Theft Auto IV has rain inside buildings pc version

[GlensaGeek]

hi people every time when it rains on grand theft auto iv on pc it also rains in side the building as well as out side it lol why is that

my pc information is

Machine name: HOME-8F26A9E286
Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 3 (2600.xpsp.080413-2111)
Language: English (Regional Setting: English)
System Manufacturer: Gigabyte Technology Co., Ltd.
System Model: M61PME-S2
BIOS: Award Modular BIOS v6.00PG
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 5000+, MMX, 3DNow (2 CPUs), ~2.6GHz
Memory: 3584MB RAM
Page File: 638MB used, 6365MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 10.0 (4.10.0000.5515)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.5512 32bit Unicode

display Devices
---------------
Card name: ATI Radeon HD 4600 Series
Manufacturer: ATI Technologies Inc.
Chip type: ATI Radeon Graphics Processor (0x9490)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_9490&SUBSYS_E101174B&REV_00
Display Memory: 1024.0 MB

[iamgame]

Funny, as it would seem. Try updating your graphics drivers to the latest ones available for your ATI card. Most of these kind of problems arise due to not up-to-date drivers.