There is a long discussion here: http://coffeeforums.co.uk/archive/index.php?t-2362.html concerning this problem. What happened is, you were sent a pressurized double filter basket, and if you are going to use this pressurized double filter basket, then you must also use the little black plastic piece with it that is shown in the photo below. If you don't have the little black part, then either you need to order it, or you need to get ahold of a "NON" pressurized double filter basket that doesn't require the little black plastic part.
I bought a Gaggia Classic a couple of months ago. There was an insert, "FOR THE U.S. CUSTOMERS ONLY" and the double basket was included along with the two "perfect crema filters" and the diffuser nozzle. I am not sure why the US got the additional basket, but I am thankful.
What you're calling the holder is the portafilter. What you're calling the filters are the baskets.
Part of your problem is not having your grinder. Without one you can't adjust the grind for your espresso machine. How did you determine what the correct grind was? Did you just use whatever the shop had their grinder set to?
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.