Bukkit

What version of QuickShop are you using?

What version + build of Bukkit are you using?
1.5.2

What is the issue?
Old shops are no longer working but new shops are.

Copy paste your config:
#Tax amount (decimal) - Eg, P1 buys $50 worth of stuff from P2.  Therefore, P1 loses $50, P2 gains $(1-0.05)*50, and tax-account gains $(0.05)*50.
tax: 0.10
#The fake player who money from taxing people goes to
tax-account: KMS12

#Should we log transactions/creations to Bukkit\Plugins\QuickShop\qs.log?
log-actions: true

#Advanced.  This chooses which economy to hook into.  If it fails, it will fall back to trying vault. Spelling must be exact. Case insensitive.
# Vault - Will hook into anything vault can hook into (Vault is required for this to work)
# Satoshis
# Want yours added? Contact me (Netherfoam) on dev.bukkit.org
economy: Vault

database:
    mysql: false
    host: localhost
    port: 3306
    database: quickshop
    user: root
    password: passwd

# Not working yet.
limits:
    #Disable these if you're not using them!
    use: false
    default: 10
    ranks:
        quickshop.vip: 20 #Players with quickshop.vip can make 20 shops.

shop:
    #Cost to make a stall
    cost: 1
    #Should we refund when their shops are deleted/removed/broken?
    refund: true

    #Is there a fee for changing prices on a shop (Help deter endless undercutting)
    price-change-requires-fee: false
    #If price changes require a fee, how much is the fee
    fee-for-price-change: 5

    #Should we try and lock their shops from other players, so people can't steal from them?
    lock: true
    #Should we require players be sneaking to create and use shops?
    sneak-only: false
    #Should we automatically create the sign for the chest?
    auto-sign: true
    #If a player owns an unlimited shop, should they receive the cash from it or not?
    #If you buy from YOUR unlimited shop, you will NEVER be charged $$, regardless of this setting
    pay-unlimited-shop-owners: false
    #Should we place display items on the chests?
    display-items: true
    #Should we place item frames on chests?
    frame-items: true
    #When someone uses /qs find <item>, how far should we search in blocks?
    #This command lets users shop quickly without wasting time searching
    #Settings > 100 WILL cause lag. Don't do it, or don't cry when your server lags.
    find-distance: 45

#List of items to disallow selling of.  Anyone with quickshop.bypass.<itemID> can bypass it
blacklist:
    - 7 #Bedrock

Copy paste your error log, if any:

What did you do to cause this issue?  Can you repeat it? (If you can't repeat it, neither can I, don't bother posting a ticket about it)
Migrate to new server

If any relevant:
* What version of Vault are you running?
* What economy and economy version are you running (E.g. BOSE or iConomy 6)

So I'm hoping you copied the QuickShop data folder to the new server as well. But if you did that, then I have no idea why this would happen without an error log at least.